Improvement in casting mold-boards



J. OLIVER.

Casting Mold-Boards. i

No.l47,l57. Param-adrien.3,1314-,

fr/mmm, 11mm/Q n ,Gia @www5 @giver UNITED STATES PATENT OFFICE.

JAMES OLIVER, OF SOUTH BEND, INDIANA.

IMPROVEMNT IN CASTING MOLD-BOARDS.

Specification forming partof Letters Patent No. 147,157, dated February 3, 1874; application tiled January 14, 1874.

CASE B.

To all whom yit may concern Be it known that I, JAMIEs OLIVER, of South Bend, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Casting Plow Mold-Boards;

, and I do hereby declare that the following is a full, clear, and exact description thereof, ret'- erence being had to the accompanying drawings and to the letters of reference marked thereon, which form a part of this specication.

My invention relates to the process of casting beveled bolt-holes in mold-boards when cast on chills; and the nature of my invention consists in providing the chill with holes for the reception of wooden or metal pins; also, in cores provided with central holes, and in pins, made either of wood or metal, to pass through the cores into the holes in the chills, as will be hereinafter morefully set forth.

In order to enable others skilled in the art to which my invention appertains to use the same, I will now proceed to describe how my process is carried out, referring to the annexed drawing, in which- Figure l is a plan view of the drag of the mold, with the chill and pattern in place; and Fig. 2 is a transverse vertical section through the line a: Fig. l.

, A represents the drag, and B the cope, of the mold or ask. C is the chill, and D the pattern. Into the face of the ch'ill C are drilled very ne holes a, about one-eighth of an inch deep, where the boltholes are wanted in the mold-board. Into these holes I Aplace closeL .tting pins d, made either of wood or metal.

On that part of the pin that projects above the face of the chill, I place a beveled metallic core, b, having a hole through its center of the same size as the holes in the face of the chill. When the pins el are made of wood, the melted iron, of which the moldboards are made, destroys them, and the cores remain in the holes of the casting without damaging them or injuring the chill during the operation of contraction. When using metal pins, they are two witnesses.

JAMES OLIVER. Witnesses:

R. C. THoMPsoN, F. C. NIPPOLD. 

